The integrated circuit used in this circuit is from the time of publication. The circuit is from a Radio Electronics from October 1987. The triac must be equipped with a heat sink.
Found in a 1969 EDN, this circuit uses components from that time. Modern equivalent transistors can be...
This amplifier with old germanium transistors is from a 1957 documentation. The power is a few...
We found this circuit in an American documentation from the 90s. The circuit combines functions of 4...